CVE-2025-27556
MEDIUM5.8EPSS 0.01%Django Potential Denial of Service (DoS) on Windows
Published: 4/2/2025Modified: 10/6/2025
Description
An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and django.views.i18n.set_language are subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.
Affected packages (3)
- Bitnami/django>= 5.0.0, < 5.0.14, >= 5.1.0, < 5.1.8
- PyPI/django>= 5.0, < 5.0.14
- PyPI/django>= 5.1, < 5.1.8, >= 5.0, < 5.0.14
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
References (13)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-27556
- ADVISORYhttps://www.djangoproject.com/weblog/2025/apr/02/security-releases/
- PATCHhttps://github.com/django/django
- WEBhttps://docs.djangoproject.com/en/dev/releases/security
- WEBhttps://docs.djangoproject.com/en/dev/releases/security/
- WEBhttps://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd
- WEBhttps://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821
- WEBhttps://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1
- WEBhttps://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml
- WEBhttps://groups.google.com/g/django-announce
- WEBhttps://www.djangoproject.com/weblog/2025/apr/02/security-releases
- WEBhttp://www.openwall.com/lists/oss-security/2025/04/02/2